山东夏玉米土壤干旱阈值研究与影响评价

董智强,李曼华,李楠,薛晓萍,陈辰,张继波,赵红,侯英雨,潘志华

The Thresholds of Soil Drought and Its Impacts on Summer Maize in Shandong Province

DONG ZhiQiang,LI ManHua,LI Nan,XUE XiaoPing,CHEN Chen,ZHANG JiBo,ZHAO Hong,HOU YingYu,PAN ZhiHua

表6 穗期轻旱与中旱不同持续天数的各指标变化程度

Table 6 The variation degree of each index of light drought and medium drought with different duration days at ear stage of summer maize (%)

干旱程度 Drought degree 干旱持续时间 Duration days of drought TAGP TWSO TWLV TWST MAXLAI 轻旱 Light drought 3 d -1.1 -0.1 -3.0 -2.8 -2.7 5 d -2.1 -0.3 -5.7 -5.4 -5.2 10 d -4.1 -2.5 -7.6 -7.0 -7.6 15 d -5.9 -4.9 -8.1 -7.6 -9.2 20 d -6.7 -6.0 -8.2 -7.8 -9.9 中旱 Medium drought 3 d -2.4 -0.4 -6.7 -6.2 -6.1 5 d -5.1 -1.3 -13.1 -12.3 -13.4 10 d -10.6 -6.6 -19.2 -18.1 -23.0 15 d -14.8 -12.3 -20.3 -19.3 -27.6 20 d -17.1 -15.5 -20.7 -19.9 -29.6